Add to every page an unparsed Notes field for administrative reference
I would find it very helpful to have, at the top of the VPN Clients page, a note that said, "If you enable/disable any of these VPN clients, be sure to update the list of watched services in Service Watchdog accordingly."
This week on the Dashboard page, some people might want to see a reminder like "TODO: When 2.4.5-p1 is installed, restore Firewall Max Table Entries from 65535 to 400000 and re-enable IPv6 bogon blocking."
And I can't tell you how many hours I'd have saved if only some pages had told me, "I know this looks wrong, but before you start 'fixing' it, here's why I did it this way....".
So my feature request: At the top of every page, please add a "Notes" field -- unparsed, with a generous size limit -- where an admin can leave a note about that page.